Blow-off valve.



A. G YERKEY. BLOW-OFF VALVE.

APPLICATION FILED JAN. 29, 1913.

1,067,959, Patented July 22, 1913.

Inventor by N I I r I ttornevs portion 2 ALVY, CLEVELAND YERKEY, OFCHICAGO, 'ILLINQIS,

BLOVJ-OFF VALVE.

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Snecifioation of Letterslotent.

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Application fiiedJanuary 29, 1913. Serial No. 744,988.

To all ache/n i! :mrz concern:

Be it known that I. Amy C. YERKEY, a citizen of the United States,residing at Chi ago, in the Ponnty of Cool; and State of Illinois, haveinvented a new and, useful Blow-Oil elive, of which the following is aSpQCliiCfitiun.

This invention relates to blow-oil valves, object lwiogzi to provide adevice of this diameter l 0% but few parts and which can be 115" 4 i forfilling and {or drawing of? water he hoiler to which the device connectWith the foregoing and other objects in view which will appear as thedescription proceeds, the invention. resides in the coin hination andarrangement of parts and in the details of construction herein-Litter described and claimed, it being understood that. changes in the preciseembodiment of the invention herein disclosed, can he made Within theseope of What is claimed, Without departing from the spirit of the.invention.

In the ar-rroinpanying drawings the preferred form oi; the invention hasbeen shown.

In said drawings :--Fignre 1 is a side elevation. Fig. 2 is a verticalsection.

Referring to the drawings of reference 1 designates the casing of thevalve, the same being fOI'IHGd'Of brass, iron or any other suitablematerial and provided with a threaded end 2 adapted to be screwed intothehniler A. The casing 1, is formed with an. interior shoulder 3constituting the seat for an annular shoulder 4- l'nrmed upon thebushing This bushing is preferably formed of steel and has its reducedend portion 6 extending downwardly past the shoulder 3 and taperedinteriorlv to form a seat, as shown at 7. The outer end of the casing 1is designed to receive a head this head being formed with an extension 8adapted to fit in the bushing and with a flange 16 which can be seenre dtoian annular flange- 11 on the casing 1. by threaded studs 12. A nippleextends from the casing l and registers with an opening in the bushing.A v .ve 1 is normally held against.- the seat 4. tlws valve lniving astem 15 projecting therefrom and into a coiled spring 16. said coiledspring being mounted on a spider 18 which is arranged Within the reducedend or the casing 1. Valve 1% a spider 19 extending therefrom and intothe by characters having an bushing 5 and slidahlv mounted in the head 9and above the centerof the spider it) is a pin 20, the upper or outerend of whirh has a head 21. A lever is fulcrnmed on an ear located onthe head 9 and one end of this lever adapted to contact with the head 21while the other end portion extends (hm'nivardly, :is shown at 2-1 so asto (:onstr trite a handle whereby the lever can be actuated readily.

As hereinhe'fore stated, the valve ll is held normally upon its seat bythe sprint! 1G. \Vhen the valve is thus, positional, water cannot escapethrough the casing l. by way of bushing 5 and nipple 13. However, byshifting lever 22 so as to sense it. to press tlon'mvnrdlv on head 21.,pin-2i) will push th valve 14 oil' of its seat and water wvill thus hefree to escape into bushing 5 and thence outwardly through the nipple13. Also, by hrgilding valvel-l'otfof its seat, water can he supplied tothe boiler by directing it into the nipple. 13 so that it can thus flowinto the bushing 5 and thence downwardly into the casing 1.

It will be seen that the entire device is formed of out few'parts andwill not, therefore, readily get out of order.

Instead of threading one end of the cos ing, a threaded extension may beformed on the casing for engtiging the boiler.

What is claimed is 1. In ahloW-oil valve the combination with a casinghaving an interior shoulder, of a lmshing having an annular shoulderadapted to hear upon said interior shoulder and provided with aninteriorlv tapered portion (constituting s set :1 head secured upon oneend of the. ng and hearing against'and Within the bushing to hold itupon the interior shoulder, a nipple extending from the easing andopening into the hiishing, a spring pressed valve normally held moon theseat in the inner end of the bushing,

a shifting pin Within the head contacting with the valve, and means foractuating the pin to unseat the valve,

2. A blow-off valve including a casing interior shoulder, a bushingfitted snugly within the casing and bearing upon the shoulder, saidbushing having a valve seat in its inner end, a head secured upon oneend of the casing and hearing against and within the bushing to hold. itupon the interior shoulder, a nipple extending from the casing andopehing into the bushing, a as my den, I have hereto aflixed spr'lngpressed valve normally bearing ture' in the presence of two witnesses,

agalnst the seat, a pin slidable within the head and bearing against thevalve, and a :ALVYCLEYELAND -T I 5 lever' fulcrumed on the head andshiftable .Witnesses:

against the pin to unseat the valve. CHAS. B. Some Box,

In testimony thatHI claim the foregoing D. M. YERKEY.

